When Do You Stop Paying Taxes on Social Security?

You stop paying federal tax on Social Security when your combined income falls below $25,000 as a single filer or $32,000 as a married couple filing jointly. For most retirees whose only income is their monthly benefit check, that line is nearly impossible to cross, so their benefits are effectively tax-free. A temporary senior deduction signed into law in 2025 pushes even more retirees below the tax line through 2028, with roughly 88 percent of beneficiaries expected to owe nothing on their benefits during those years.¹

How the IRS Decides Whether Your Benefits Are Taxed

The formula that determines whether you owe anything is called “combined income” (sometimes “provisional income”). It has three parts: your adjusted gross income, any tax-exempt interest you earned during the year, and exactly half of the Social Security benefits shown in Box 5 of your Form SSA-1099.²

The half-of-benefits piece is what catches people off guard. If you received $24,000 in Social Security last year, only $12,000 of it feeds the calculation. That single detail is the reason so many retirees with modest total income never cross into taxable territory.

The Federal Thresholds by Filing Status

Once you know your combined income, the IRS applies a two-tier system. The dollar lines have not changed since they were written in 1984 and 1993, and they are not indexed for inflation.³

Single filers below $25,000: no tax on benefits.
Single filers between $25,000 and $34,000: up to 50 percent of benefits become taxable.
Single filers above $34,000: up to 85 percent of benefits become taxable.
Joint filers below $32,000: no tax on benefits.
Joint filers between $32,000 and $44,000: up to 50 percent of benefits become taxable.
Joint filers above $44,000: up to 85 percent of benefits become taxable.

The taxable portion never rises above 85 percent of your total benefits, no matter how high your income climbs. And “taxable” does not mean the government keeps 85 percent of your check. It means that amount is added to your other income and taxed at your regular marginal rate.⁴ Someone in the 12 percent bracket with 85 percent of benefits taxable owes 12 percent on that 85 percent, not 85 percent of the benefit itself.

The Trap for Married Couples Filing Separately

If you are married, file separately, and lived with your spouse at any point during the year, the IRS sets your base amount at zero. Up to 85 percent of your benefits can be taxed starting from the very first dollar of combined income.⁴ There is no protected zone. The only exception is when you lived apart from your spouse for the entire year, in which case you use the single-filer thresholds.

The New Senior Deduction Through 2028

The One, Big, Beautiful Bill Act, signed on July 4, 2025, did not repeal the tax on Social Security benefits. It created a separate deduction for people age 65 and older that is large enough to eliminate the tax for most of them.¹

Single filers 65 or older: up to a $6,000 deduction, available in full when modified adjusted gross income is $75,000 or less. It phases out by 6 cents for every dollar of income above $75,000 and disappears at $175,000.
Joint filers 65 or older: up to $12,000 ($6,000 per qualifying spouse), available in full when modified adjusted gross income is $150,000 or less. The phase-out runs from $150,000 to $250,000.

The deduction applies whether you take the standard deduction or itemize. For a single retiree in the 12 percent bracket who had $3,000 of Social Security included in taxable income, a $6,000 deduction more than wipes that amount out. The provision currently expires after 2028 unless Congress extends it.⁵

If Social Security Is Your Only Income

When your monthly benefit is your only source of money, you almost certainly owe zero federal tax on it. The math makes this nearly automatic. Because the formula counts only half of your benefits, even a generous individual benefit of $3,000 per month ($36,000 annually) produces just $18,000 in combined income. That is well below the $25,000 single-filer threshold.²

The same logic covers a married couple filing jointly. Two benefits totaling $50,000 per year yield $25,000 in combined income, still under the $32,000 joint threshold. Without wages, pension payments, rental income, or investment dividends adding to the pile, there is no way to trip the trigger. Retirees in this situation generally do not need to file a federal return at all.

Why Extra Income Can Pull You Back Above the Line

Retirees who pick up part-time work, take a pension distribution, or sell investments often find something unpleasant: each additional dollar of ordinary income doesn’t just get taxed itself. It can also drag more of your Social Security into the taxable column. Financial planners call this the “tax torpedo.”

In the first tier (combined income between $25,000 and $34,000 for single filers), every extra dollar of income makes another 50 cents of Social Security taxable. You are paying tax on $1.50 of income for every $1.00 you actually earned. At the 12 percent bracket, your effective marginal rate jumps to 18 percent. In the second tier (above $34,000), each dollar makes 85 cents of benefits taxable, so you are taxed on $1.85 per dollar earned. At the 12 percent bracket, that works out to an effective rate of 22.2 percent. At the 22 percent bracket, it reaches roughly 40.7 percent.

The torpedo is temporary. Once 85 percent of your benefits are fully included, each new dollar of income is taxed at your normal rate again. But for retirees in that middle-income zone, the spike is real, and a small increase in outside income can produce a surprisingly large tax bill.

How to Keep Combined Income Below the Threshold

Since the formula drives everything, the goal is to keep its inputs low. A few approaches work best when you plan ahead of claiming benefits.

Convert traditional retirement accounts to Roth before you claim. Withdrawals from a traditional IRA or 401(k) count as income in the combined income formula. Roth withdrawals do not. The years between leaving work and starting Social Security, sometimes called “gap years,” are the ideal window because your taxable income is typically at its lowest. Once you are collecting benefits, large conversions become self-defeating: the conversion income itself pushes more benefits into the taxable range.

Time investment gains carefully. Capital gains flow straight into adjusted gross income. Bunching sales into one year rather than spreading them can keep combined income below the threshold in the other years. Harvesting losses to offset gains reduces the net amount that hits your return.

Watch what tax-exempt interest does. Municipal bond interest is free from federal income tax, but it still counts in the combined income formula. Retirees who load up on municipal bonds expecting them to be invisible to the IRS sometimes discover the bond income is pushing benefits into the taxable zone.

State Taxes Are a Separate Question

The vast majority of states do not tax Social Security benefits at all. Fewer than ten states still impose some level of tax on these benefits as of 2026, and that number has been shrinking as legislatures phase out the practice. State rules typically differ from the federal formula: some exempt benefits entirely once you reach a certain age, and others set income thresholds well above the federal ones.

Where you live will not change your federal combined income calculation, and it will not change the thresholds under 26 U.S.C. § 86. It only determines whether your state takes an additional cut on top of what the IRS does.

1
Internal Revenue Service. One Big Beautiful Bill Provisions – Individuals and Workers
2
Internal Revenue Service. Social Security Income
3
Social Security Administration. Research Note 12 – Taxation of Social Security Benefits
4
Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits
5
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Including Amendments From the One Big Beautiful Bill